What are you supplying with your pump? I’m not seeing any correlation between a flow at 20 psi and sizing a pump. What flow are you talking about, a municipal flow rate or what?
If for sprinkler systems, you size the pump based on the characteristics of the water supply and the system demands. There are ways to get an estimate on pump size but the final selection better be verified through hydraulic calculations. Craig L. Prahl Fire Protection Group Lead/SME CH2M 200 Verdae Blvd. Greenville, SC 29607 Direct - 864.920.7540 Fax - 864.920.7129 CH2MHILL Extension 77540 [email protected] From: Sprinklerforum [mailto:[email protected]] On Behalf Of Zachary Siegrist Sent: Wednesday, May 18, 2016 3:23 PM To: [email protected] Subject: Equation for sizing fire pump Is there an equation to specify an appropriate pressure when sizing a fire pump? For example, when sizing gpm, I've always taken the GPM available at 20 psi divided by 1.5 to give me the maximum GPM rating of the pump. I'm inquiring to see if such a formula is available to size the pressure correctly. Can anyone help? Zach Siegrist
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